diff options
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 95c7959c7949..620fab01b710 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -1553,6 +1553,52 @@ static ssize_t dasd_aqr_store(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR(aq_requeue, 0644, dasd_aqr_show, dasd_aqr_store); /* + * aq_timeouts controls how much retries have to time out until + * a device gets autoquiesced + */ +static ssize_t +dasd_aq_timeouts_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_device *device; + int len; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + len = sysfs_emit(buf, "%u\n", device->aq_timeouts); + dasd_put_device(device); + return len; +} + +static ssize_t +dasd_aq_timeouts_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct dasd_device *device; + unsigned int val; + + device = dasd_device_from_cdev(to_ccwdev(dev)); + if (IS_ERR(device)) + return -ENODEV; + + if ((kstrtouint(buf, 10, &val) != 0) || + val > DASD_RETRIES_MAX || val == 0) { + dasd_put_device(device); + return -EINVAL; + } + + if (val) + device->aq_timeouts = val; + + dasd_put_device(device); + return count; +} + +static DEVICE_ATTR(aq_timeouts, 0644, dasd_aq_timeouts_show, + dasd_aq_timeouts_store); + +/* * expiration time for default requests */ static ssize_t @@ -2403,6 +2449,7 @@ static struct attribute * dasd_attrs[] = { &dev_attr_ping.attr, &dev_attr_aq_mask.attr, &dev_attr_aq_requeue.attr, + &dev_attr_aq_timeouts.attr, NULL, }; |